You can manipulate panel objects in the following ways:
Move objects within a panel, or to another panel.
You can move any object to another location in the panel. You can also move an object from one panel to another panel. Use the middle mouse button to drag the panel object to the new location.
Copy menu items to a panel.
Drag the item from the menu to the panel. Alternatively, if the menu item is a launcher right-click on the menu item, then choose Add this launcher to panel.